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Real-World HPC: Setting Up an HPC Cluster
04.11.2011
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through NAT. Listing 1 has some critical settings for the /etc/sysconfig/iptables  file. Listing 1: /etc/sysconfig/iptables *filter :INPUT ACCEPT [0:0] :FORWARD ACCEPT [0:0] :OUTPUT ACCEPT [0:0] :RH
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NVDIMM and the Linux kernel
11.10.2016
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Lead Image © Denis Dryashkin, 123RF.com
=/mnt/test.dat oflag=direct bs=4k count=$((1024*1024)) 1048576+0 records in 1048576+0 records out 4294967296 bytes (4.3 GB, 4.0 GiB) copied, 4.55899 s, 942 MB/s Availability NVDIMMs will probably go on sale
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NVDIMM Persistent Memory
22.09.2016
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*1024)) 1048576+0 records in 1048576+0 records out 4294967296 bytes (4.3 GB, 4.0 GiB) copied, 4.55899 s, 942 MB/s Availability NVDIMMs will probably go on sale to the general public in 2017. To make the Linux
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Admin as a service with sysstat for ex-post monitoring
01.06.2024
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Lead Image © Levente Janos, 123RF.com
ALL 04 $ sar -f /var/log/sysstat/sa07 -s 23:30:00 -e 23:55:00 -P 1,2 However, filtering by specific days is often not enough, so you can filter for a time interval by passing -s [
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Protect Your Servers with Nmap
23.07.2012
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your source IP address but not for nefarious use, # nmap -S 3.3.3.3 12.34.56.78 then by port range, with no pings to avoid immediate detection and with operating system detection (-A): # nmap -P0 -p1
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Give your servers the once over with Nmap
31.10.2025
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© ragsac, 123RF.com
, in case that triggers a firewall's ruleset: # nmap -P0 12.34.56.78 Then, run the UDP and SYN (Stealth) scans concurrently, as mentioned previously: # nmap -sUS 12.34.56.78 With the use of the -f
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A simple approach to the OCFS2 cluster filesystem
30.11.2025
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© Kheng Ho Toh, 123RF.com
name. In OCFS2's case, a single ASCII file is all it takes (Listing 1). Listing 1 /etc/ocfs2/cluster.conf node: ip_port = 7777 ip_address = 192.168.0.1 number = 0
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Data Compression as a CPU Benchmark
28.11.2021
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Lead Image © Lucy Baldwin, 123RF.com
Compiler: Apple LLVM 12.0.5 (clang-1205.0.22.9) GCC 4.2.1 CLANG 12.0 Darwin : 20.4.0 : Darwin Kernel Version 20.4.0: PageSize:16KB Apple M1 8C8T RAM size: 16384 MB, # CPU hardware threads: 8 RAM usage
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Tips and Tricks for Containers
12.05.2020
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): root@c31656cbd380:/# apt-get update Get:1 http://security.ubuntu.com/ubuntu bionic-security InRelease [88.7 kB] ... Fetched 18.0 MB in 9s (1960 kB/s) After the package repositories are synced, I can
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Processor and Memory Affinity Tools
14.09.2021
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 sizes:                   43 bits physical, 48 bits virtual CPU(s):                          64 On-line CPU(s) list:             0-63 Thread(s) per core:              2 Core(s) per socket:              32 Socket(s

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